CN102575687A

CN102575687A - Fan unit and air conditioner equipped with fan unit

Info

Publication number: CN102575687A
Application number: CN2009801611211A
Authority: CN
Inventors: 松本崇; 迫田健一
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2009-08-25
Filing date: 2009-08-25
Publication date: 2012-07-11
Anticipated expiration: 2029-08-25
Also published as: EP2472190A1; CN102575687B; EP2472190A4; US20120134794A1; JPWO2011024215A1; EP2472190B1; WO2011024215A1; JP5230814B2

Abstract

An air conditioner equipped with a fan unit consisting of a housing, a fan contained in the housing, a casing provided behind the fan so as to be adjacent thereto and guiding airflow, and a stabilizer provided in front of the fan so as to be adjacent thereto and causing a circulating vortex to be stationary. If the result of the expression delta = A/D is not greater than 2 with A representing the width of an airflow inlet opening and D the diameter of the fan, the angle beta of inflow of air to outer peripheral blades, said angle beta being represented by beta = delta*gamma (radian) and affecting efficient inflow of the sucked air, is determined so as to satisfy the relationship 0.4 >= gama >= 0.3. Even if the size of the airflow inlet opening is small, the configuration suppresses occurrence of noise and enhances air supply performance of the fan device.

Description

Blower and have the air conditioner of this blower

Technical field

The present invention relates to a kind of blower and have the air conditioner of this blower; In detail; Relate to housing and be accommodated in the crossflow fan (cross flow fan in this housing; Below only be recited as crossflow fan) the shape of cover (casing) of the wing (blade, below also be recited as blade sometimes), the steering flow that is provided with in abutting connection with ground with blower.

Background technique

Usually, tubular blower is used as the Blast mechanism of air conditioner, and it is by constituting like the bottom: housing; Be accommodated in the crossflow fan in the housing; Be arranged on the cover of the steering flow of back side with mode with the crossflow fan adjacency; With what the mode with the crossflow fan adjacency was arranged on the front surface side circular vortex is carried out the stabilizer (stabilizer) of stabilization.

As the Blast mechanism of such air conditioner the time, its housing is cuboid roughly mostly, and by constituting like the bottom: a plurality of rigid faces that are used for support housing; At least one that is provided with air blow-off outlet (below, also be recited as relief opening) blows out face; Be provided with at least one suction face of air suction inlet (below, also be recited as intakeport), set each face with 6 the mode of adding up to of the quantity of face.

In this case, the rigidity of housing is high, can stably keep load, therefore, mostly with the face with maximum area of cuboid as rigid face.From the aspect of gettering efficiency, preferred air suction inlet is big as far as possible.Therefore, face that usually will be relative with rigid body face with maximum area and have second large-area totally two faces as suction face.In addition, at suction port cancellate grid (grille) is set usually, hides internal structure, and prevent that finger from getting into.

In addition, usually, the air blow-off outlet is set having second large-area another face, two faces that will have minimum area are as rigid face.In so tubular blower, flow into crossflow fan from the air of the air suction inlet of the upper surface of housing and front surface through loss bodies such as filter, heat exchangers, rise at the inner stagnation pressure of crossflow fan, this air is blown side out to cover.Under the situation that can not obtain high air quantity, the rotating speed of crossflow fan is risen, the result causes noise to rise.

Therefore; The invention of following air conditioner is disclosed: the back passage (rear gap) that forms by back guide through special provision with the position relation of the prepass (front gap) that forms by front guide, and link crossflow fan rotating center and after the line and the horizontal line angulation of passage; And the position of the tongue of special provision front guide; Can suppress generation of noise and improve air blast performance (for example, with reference to patent documentation 1).

In addition; Following invention is disclosed: link in the crossflow fan that a plurality of impellers that maintain a plurality of blades form at the support plate of end plate through both sides and intermediate portion; The periphery blade angle be Bo, interior all blade angles be Bi, blade number be Z, when pitch-chord ratio is T; Expressed the relation (for example, with reference to patent documentation 2) of the periphery blade angle Bo of the crossflow fan that is used to realize high air quantity, high pressure and low noise, inboard blade angle Bi, blade number Z, pitch-chord ratio T.

In addition; Following invention is disclosed: have crossflow fan and the suction side stream and the air conditioner that blows out the stabilizer that separates on the effluent road that are used for making this crossflow fan, having: tongue, it is formed at stabilizer with the mode of extending along the sense of rotation of crossflow fan; And form as follows; That is, along with the opposing side of itself and crossflow fan goes to the sense of rotation of crossflow fan, the gap of itself and crossflow fan periphery circle diminishes gradually; Jut; It is to be formed on crossflow fan periphery circle and the minimum tongue tip portion in the gap of tongue to the inner outstanding mode of crossflow fan; This jut is the minimum clearance portion with crossflow fan; With the axial quadrature of blower fan, and section shape is general triangular, and jut is 25%～35% of the minimum clearance size G1 of crossflow fan periphery circle and the crossflow fan opposing side of tongue from the outstanding height H s of the crossflow fan opposing side of tongue; The drift angle of jut is 50 °～75 ° (for example, with reference to patent documentations 3).

But; Above-mentioned blower in the past is the invention about the situation that increases the intakeport area as far as possible; In such blower in the past; The width of the air suction inlet that will be located at housing upper surface and front surface be defined as A, with the diameter of crossflow fan be defined as D, when Size factor (size factor) δ of crossflow fan is defined as δ=A/D; The width A of air suction inlet that is located at housing upper surface and front surface is enough big for crossflow fan radius D, and the Size factor δ of crossflow fan is about 3～4 usually, when air flows into sidelong flow fan; Excessive negative pressure, bias current can not produce from air suction inlet, and can stably carry out air blast.

At this, the front surface of housing is bigger to influence that demander is brought on aesthetic feeling.Therefore, urgently be desirably in the structure that front surface is not provided with intakeport.And the expectation for the product miniaturization is also very strong, need dwindle the Size factor δ of crossflow fan.

Under these circumstances, if on the basis of the structure of above-mentioned blower in the past, directly dwindle intakeport, then when air flows into sidelong flow fan; Produce excessive negative pressure and bias current, change thereby make to flow, it is big that the direction angulation of the wing of crossflow fan and air-flow becomes; As a result, the wing reduces towards the Momentum Transfer efficient of fluid, and the air blast performance reduces; And pressure oscillation increases, and noise also increases.In addition, the result of narrowization of suction port is, the air that extrudes from the wing of crossflow fan is to suction port lateral deviation stream, the flowing instability in the section of crossflow fan, and the result, air-flow is along the collision of cover Normal direction, and loss increases.The present invention provides a kind of blower, solves such problem points, and this blower has the crossflow fan that under the narrow situation of air suction inlet, also can realize high air quantity and high pressure and low noise.

Patent documentation 1: TOHKEMY 2007-40544 communique

Patent documentation 2: japanese kokai publication hei 6-323294 communique

Patent documentation 3: TOHKEMY 2004-150789 communique

Summary of the invention

Therefore; The present invention makes in order to solve above-mentioned problem, and its purpose is to provide a kind of blower, and the air suction inlet of this blower is narrow; The width with air suction inlet be defined as A, with the diameter of crossflow fan be defined as D, when the Size factor δ of crossflow fan is defined as δ=A/D; δ=A/D is below 2, brings the periphery blade fluid inlet angle of influence for the gettering efficiency of the wing of crossflow fan through special provision, can suppress generation of noise and can improve the air blast performance.

Blower of the present invention has: housing, and this housing has intakeport and relief opening; Crossflow fan, this crossflow fan are configured in this housing; Cover, this cover is arranged on back side with respect to crossflow fan, constitutes the part of relief opening; Stabilizer; This stabilizer is arranged on the front surface side with respect to crossflow fan, and is relative with cover, constitutes the part of relief opening; It is characterized in that; Intakeport and running shaft crossflow fan roughly the maximum inhale width of rectangular direction be the diameter of A, crossflow fan when being D, have following relation: periphery blade fluid inlet angle β is defined as β=(A/D) * γ (radian), wherein A/D≤2 and 0.4>=γ>=0.3.

According to the present invention, even can constitute the blower that under the narrow situation of air suction inlet, also can suppress generation of noise and improve the air blast performance.

Description of drawings

Fig. 1 is the sectional view of air conditioner with blower of mode of execution 1 of the present invention.

Fig. 2 is the stereogram of air conditioner with blower of mode of execution 1 of the present invention.

Fig. 3 is the peripheral amplification view of crossflow fan of the blower of mode of execution 1 of the present invention.

Fig. 4 is the sectional view of a wing of crossflow fan of the blower of expression mode of execution 1 of the present invention.

Fig. 5 utilizes percentaeg to represent the figure of efficient of the blower of mode of execution 1 of the present invention.

Fig. 6 is the air-flow stagnation pressure distribution map of the blower of mode of execution 1 of the present invention.

Fig. 7 is the figure of air blast efficient of the blower of expression mode of execution 1 of the present invention.

Fig. 8 is the peripheral amplification view of crossflow fan of the blower of mode of execution 2 of the present invention.

Fig. 9 is used to represent the amplification view of enlarged-area than the crossflow fan periphery of the blower of the mode of execution of the present invention 2 of τ.

Figure 10 utilizes percentaeg to represent the figure of efficient of the blower of mode of execution 2 of the present invention.

Figure 11 is the air-flow stagnation pressure distribution comparison diagram of the blower of mode of execution 2 of the present invention.

Figure 12 is the figure of air blast efficient of the blower of expression mode of execution 2 of the present invention.

Embodiment

Mode of execution 1

Next, utilize description of drawings mode of execution of the present invention.In the record of following accompanying drawing, to marking same reference character or similar reference character with a part or similar part.But accompanying drawing is schematic figure, should be noted that the ratio etc. and actual condition of different of each size.Therefore, concrete size etc. should be judged with reference to following explanation.In addition, certainly, also there are the relation or the ratio different portions of size each other each other at accompanying drawing.

Fig. 1 is the sectional view of air conditioner with blower of mode of execution 1 of the present invention.In addition, Fig. 2 is the stereogram of air conditioner with blower of mode of execution 1 of the present invention.In the drawings, housing 1 is by constituting like the bottom: front panel 1a, and it is positioned at the front portion of housing, is of a plurality of rigid faces of being used for support housing; Rear board 1b, it is one that is located in other the rigid face of the position relative with front panel 1a; Top plate 1c, it is positioned at the top of housing, for being provided with the suction face of air suction inlet 4; Lower panel 1d, it is located at the position relative with top plate 1c, for being provided with the face that blows out of air blow-off outlet 8; Left and

right side panel

1e and 1f, this left and

right side panel

1e and 1f are positioned at the sidepiece of housing, are one in a plurality of rigid faces of support housing.

The crossflow fan 2 that has towards a plurality of wings (blade) of blower fan sense of rotation disposes with the mode that is accommodated in the housing 1; The suction air-flow side of crossflow fan 2 is provided with the heat exchanger 3 that is Eight characters shape configuration, to from outside and from the gap of the suction grid 5 of being located at air suction inlet 4 temperature of inhaled air is controlled through filter 6.Cover 7 is positioned at the surperficial downstream side, roughly back of crossflow fan 2 along with trend lower panel 1d side and enlarging, and constitutes and blow out the effluent road, and this blows out the effluent road towards blow-off outlet 8, is used for the air that has carried out heat exchange through heat exchanger 3 is blown out to indoor.Stabilizer 9 be positioned at the roughly front surface bottom of crossflow fan 2 near and relative position, with the suction side stream of crossflow fan 2 with blow out the effluent road separately.In addition, A representes that the running shaft with crossflow fan 2 of intakeport 4 becomes the maximum inhale width of the direction of approximate right angle, and D representes the blower fan diameter.

In the blower that as above-mentioned, constitutes,, with the mode that can load and unload front panel 1a is set in order to unload filter 6, but when air blast, this front panel 1a is the state that is fixed in illustrated position like Fig. 1 and shown in Figure 2 with crossflow fan.When blower turns round; Crossflow fan 2 is along turning clockwise; When crossflow fan 2 rotations; Suck indoor air from the gap of the suction grid 5 of being located at air suction inlet 4, after removing airborne bigger dust through filter 6, with the mode that is divided into front surface side and back side through heat exchanger 3.Air through heat exchanger 3 is cooled or is heated, and is sucked by crossflow fan 2 afterwards.Afterwards, be transported to blow-off outlet 8 from crossflow fan 2 to the air that the surface of cover 7 blows out, and be blown out to indoor towards the oblique below of housing 1.

Fig. 3 is the peripheral amplification view of crossflow fan of the blower of mode of execution 1 of the present invention.In addition, Fig. 4 is the sectional view of a wing of crossflow fan of the blower of expression mode of execution 1 of the present invention.In Fig. 3, crossflow fan 2 by a plurality of, be that 35 wings 10 constitute at this, the wing 10 interval each other can be impartial, also can be unequal, also can be any, but need be the good structure of air blast efficient.

In Fig. 4, the arrow of B is represented sense of rotation, and the dotted line of C is represented the track of wing outer circumferential side, and the dotted line of E is represented the track of all sides in the wing.The wing 10 is made up of roughly circular-arc wing outer side surface 10a and roughly circular-arc wing inner side surface 10b, and disposes towards the mode of its sense of rotation with wing inner side surface 10b.At this moment, with the track of the tip side of the wing 10, be that the tangent line angulation of point on top of the circular arc that become with wing outer side surface 10a of the tangent line of tip portion of the wing 10 of the track of wing outer circumferential side is as periphery blade fluid inlet angle β.

In the blower of mode of execution 1 of the present invention; Becoming the maximum inhale width of the direction of approximate right angle at the running shaft with crossflow fan 2 of intakeport 4 is that the diameter of A, crossflow fan 2 is when being D; Through orthogonal experiment based on method of experimental design; Periphery blade fluid inlet angle β is β=(A/D) * γ (radian), wherein the γ that increases of the air blast efficient under the situation of A/D≤2 explores to making; Utilization is represented the result of comparison with respect to the percentaeg of value most effective in the mode of execution, and Fig. 5 representes this result.In the drawings, the longitudinal axis is represented performance than (%), and transverse axis is represented the value of γ.At this, F representes the scope of preferred γ of the blower of mode of execution 1 of the present invention.

In orthogonal experiment based on method of experimental design, make the impartial variation of a plurality of factors, be equivalent to the experiment of total divisor experiment, thus, implement the experimental technique that carries out according to the orthogonal arrage of only extracting the big factor of effect out.The reliability of the optimum value that obtains through orthogonal experiment utilizes variance analysis to confirm, implements the F check, thus, is come on statistics, to support by its significant level.In mode of execution 1 of the present invention, for the factor of the shape of the efficient that helps the wind path and the wing, implement to be known as the analysis of 8 factors of L18 orthogonal arrage by 18 experiments, carried out 4374 kinds supposition.Through this method, confirmed the following fact, that is, as long as the optimum value of γ is in the scope of 0.4 >=γ >=0.3.By the F check significant level being tested, is below 1%, has confirmed that 99% is believable on statistics.

In technology in the past, from preventing the viewpoint of following situation, γ=below 0.28, above-mentioned situation is that with respect to flowing of air-flow, the blade of blower fan and air-flow form precipitous angle, to the Momentum Transfer efficient reduction of fluid usually.That is, when (A/D) getting near 1 minimum value, β was below 0.28 when γ=0.28 was following.β is below 16.1 degree.Less than 20 o'clock, the wing significantly reduced to the Momentum Transfer of fluid at periphery blade fluid inlet angle β, must increase rotating speed, therefore, usually, did not constitute the blower below γ=0.28.

In addition, the above situation in γ=0.43 be β get very large value perhaps (A/D) get the situation of very little value, suppose (A/D) when getting maximum value 2, the β when γ=0.43 is above is more than 0.86 radian, periphery blade fluid inlet angle β be 49.3 spend more than.In this case, the blade of blower fan becomes precipitous angle with respect to the angle of air-flow, to the Momentum Transfer efficient reduction of fluid.

On the other hand, when getting minimum value, suppose (A/D)=1 at (A/D), then the width A of intakeport is identical with blower fan diameter D.Usually; Flow, enlarge the caused loss of flowing for fear of shrinking; The wind path constant width of expectation fluid machinery, from such viewpoint, the width A of expectation intakeport is about half of length of circumference of blower fan diameter D; Its value is A=π (Ratio of the circumference of a circle to its diameter ≈ 3.14) * D, i.e. (A/D)=π.Contracted flow, enlarge square increase of the caused loss of stream, therefore, under the situation of (A/D)=1, compare with the situation of wind path constant width with flow velocity, for π square loss (9.87 times), be difficult to set up as machinery.Therefore, usually the blower of γ=more than 0.43 does not exist.

Fig. 6 is illustrated in the blower of mode of execution 1 of the present invention, the air-flow stagnation pressure distribution map when for example δ=A/D=1.7, β=δ * γ=1.675 * 0.3=0.55 (radian).In the drawings, the part that is centered on by dotted line G representes to hinder the position of air blast.In blower in the past; The whirlpool of staying that hinders air blast begins from the zone of connection stabilizer 9 with the central shaft of crossflow fan 2, obviously is present in cover 7 sides, thus; Performance reduces; But in this mode of execution, roughly be positioned at the zone and the variation of the central shaft that connects stabilizer 9 and crossflow fan 2 in the whirlpool, can form the flowing space that does not hinder air blast.

Fig. 7 representes the air horsepower of crossflow fan and the relation of fluid energy, the high more situation of the expression big more air blast efficient of inclination.In the drawings, the longitudinal axis is represented fluid energy (W), and transverse axis is represented air horsepower (W).At this, represent following situation, that is, in the blower of mode of execution 1 of the present invention, to compare inclination big with blower in the past.Through experimental verification the result who improves effect of the flowing space of Fig. 6 be to confirm following situation: with respect to technology in the past, can obtain big air blast efficient.At this, obtaining can reducing rotating speed under the situation of identical blast volume, the result can confirm also to promote the improvement of noise.

At the δ=A/D shown in the mode of execution 1 of the present invention is in the structure of the narrow blower of air suction inlet 4 below 2, the periphery blade fluid inlet angle β of the wing 10 of crossflow fan 2 is set in the suitable scope, thereby makes the direct of travel angulation optimization of the wing 10 with the air-flow of crossflow fan 2; The result; The Momentum Transfer efficient and the air blast performance to fluid of the wing 10 improve, in addition, and consequently; Can suppress intake, so noise, vibration reduce.In mode of execution 1 of the present invention, air conditioner is illustrated, but, also can accesses equal effect for other equipment with the Blast mechanism that does not comprise heat exchanger, filter.

Mode of execution 2

In above-mentioned mode of execution 1, the structure of following blower is disclosed, promptly; Scope through regulation periphery blade fluid inlet angle β; Can under the narrow situation of air suction inlet, suppress generation of noise and improve the air blast performance, but in mode of execution 2 of the present invention, the structure of above-mentioned blower limits through function r (θ); When the angle from beginning portion of the curve of the expansion wind path of establishing cover was θ, this function r (θ) was that benchmark is confirmed with distance and the angle apart from the rotating center of crossflow fan.

Fig. 8 is the peripheral amplification view of crossflow fan of the blower of mode of execution 2 of the present invention.In addition, have structure and action and above-mentioned mode of execution 1 identical of air conditioner of the blower of mode of execution 2 of the present invention, therefore omit explanation.

In Fig. 8, cover 7 becomes one with the rear board 1b with housing 1 or the form that is installed on rear board 1b forms, and the mode that blows out the side directed air-flow of portion with the air-flow along crossflow fan 2 is arranged to roughly curve-like.Under the situation of the shape of special provision cover 7 (constituting the curve of wind path); In the distance till the beginning portion of the curve of the expansion wind path from the rotating center of crossflow fan 2 to cover 7 is that the central angle from beginning portion of r0, crossflow fan 2 is when being θ; Can be benchmark with distance and the angle apart from the rotating center of crossflow fan 2, (θ * ι), wherein ι be that enlarged-area is stipulated than the constant of τ to utilize function r (θ)=r0 * exp.

Fig. 9 is used to represent the amplification view of enlarged-area than the crossflow fan periphery of the blower of the mode of execution of the present invention 2 of τ.In the drawings; To begin radius divided by the rotating center from crossflow fan 2 be that r0, central angle are the ratio that the fan-shaped area (A2) of 90 degree obtains to enlarged-area in order to enlarge wind path area (A1+A2) than τ; Enlarge wind path area (A1+A2) and serve as reasons, that is: the curve that become of the expansion wind path of cover 7 like the area of bottom around the zone that forms; Binding from the rotating center of crossflow fan 2 to beginning portion (at this; Beginning portion is meant the starting point of the expansion wind path of cover 7; Its with begin to be restricted to the arbitrarily angled of 0≤θ 1≤90 from the rotating center of crossflow fan 2 towards the Vertical direction angulation θ 1 of air suction inlet 4 directions, be that the distance apart from the rotating center of crossflow fan 2 is the part of r0) line segment; Straight line is with the point that enlarges the wind path curved intersection, and above-mentioned straight line is a benchmark with the rotating center of crossflow fan 2, with the line segment angulation that links from the rotating center of crossflow fan 2 to beginning portion be 90 degree.

Promptly; Enlarged-area is obtained with the ratio of the integral value of the fan-shaped part of circle than the function r (θ) that τ is used as like lower area; Above-mentioned zone is to enlarge wind path to begin angle be the zone between θ 1 and the θ 2, and above-mentioned θ 2 is θ from the angle of beginning portion, be with from the rotating center of crossflow fan towards the vertical direction angulation of the direction of air suction inlet; Generally speaking, enlarged-area is than being represented by τ=(exp (2 * ι * θ 2)-exp (2 * ι * θ 1))/(2 * ι * (θ 2-θ 1)).Particularly, under the situation of θ=90 degree, enlarged-area is than being represented by τ=(exp (2 * ι * pi/2)-exp (2 * ι * 0))/(2 * ι * pi/2).

At this, in the technical field of fluid machinery, function r (θ) is known as the function of the general wind path shape of logarithmic spiral for decision.Function r (θ) is the function through deriving like the bottom, that is: the continuous formula of the fluid that does not lose when supposing non-the compression; The streamline formula that the character that flow angle in the expansion wind path when untiing law of conservation of angular momentum is constant derives.

For guiding and the dynamic pressure that will cover 7 air-flow is adjusted into preferred state to the conversion of static pressure, need change the expansion degree of curve according to the value of ι.But as above-mentioned, in the curve that the formula of being untied by the fluid that the time does not lose according to non-compression is derived, in the fluid in the fluid machinery that in fact has loss, streamline is not quite identical, on a part, is provided with straight line sometimes.Therefore, in the blower of mode of execution 2 of the present invention, do not stipulate to cover 7 shape, but stipulate recently that through the enlarged-area of wind path the enlarged-area of wind path is the most important as the character that enlarges wind path than regulation through r (θ).

Figure 10 is following figure: in the blower of mode of execution 2 of the present invention; When establish with crossflow fan 2 hithermost parts be beginning portion, distance from the rotating center of crossflow fan 2 to beginning portion is that the rotation center angle from beginning portion of r0, crossflow fan 2 is when being θ; Distance and angle with apart from the rotating center of crossflow fan 2 are benchmark; Through explore the τ of the air blast efficient increase that makes following situation based on the orthogonal experiment of method of experimental design; That is, (θ * ι), wherein ι is the situation of enlarged-area than the constant of τ to function r (θ)=r0 * exp, utilizes the result who representes comparison with respect to the percentaeg of value most effective in the mode of execution.In the drawings, the longitudinal axis is represented performance than (%), and transverse axis is represented the value of τ.At this, H representes the scope of preferred τ of the blower of mode of execution 2 of the present invention.

In orthogonal experiment based on method of experimental design, make impartial variation of a plurality of factors be equivalent to the experiment that total divisor is tested, thus the experimental technique that enforcement is carried out through the orthogonal arrage of only extracting the bigger factor of effect out.The reliability of the optimum value that obtains through orthogonal experiment utilizes variance analysis to confirm, implements the F check, comes on statistics, to support through significant level thus.In mode of execution 2 of the present invention, for the factor of the shape of the efficient that helps wind path and cover, the analysis of 8 factors that are known as the L18 orthogonal arrage is implemented through 18 experiments, carried out 4374 kinds supposition.Through this method, confirmed to be used to derive the optimum value of the ι of τ, confirm as long as constitute with the mode in the scope of 0.21 >=ι >=0.23.By F check significant level being tested, is below 1%, confirms 99% believable on statistics.

Making the scope of the enlarged-area of air blast efficient increase than τ about the result according to above-mentioned ι, is basis with the orthogonal experiment based on method of experimental design, utilizes percentaeg that efficient is compared; The result; In technology in the past, ι=0.2 or about 0.3, therefore; τ is 1.39 or 1.66, can only obtain mode of execution 2 of the present invention blower efficient about 60%.On the other hand, in the blower of mode of execution 2 of the present invention, be located at enlarged-area in the scope of 1.416 >=τ >=1.466 than τ; Thus; Can access big air blast efficient with respect to technological in the past, obtain under the situation of identical blast volume, rotating speed is reduced; As a result, can also promote the improvement of noise.

Figure 11 is illustrated in the blower of mode of execution 2 of the present invention, the air-flow stagnation pressure distribution comparison diagram of δ=A/D=1.7, ι=0.21 o'clock.In the drawings, (a) the air-flow stagnation pressure of the blower of expression mode of execution 2 of the present invention distributes, (b) the expression air-flow stagnation pressure distribution of the blower of technology in the past.In technology in the past; The air-flow that blows out from crossflow fan 2 produces stream with the mode along cover 7; Owing to making efficient, the viscosity loss at wall declines to a great extent; But in the structure of the blower of mode of execution 2 of the present invention, air-flow is rotating center at cover 7 and stabilizer 9 and has the velocity distribution near the little Poiseuille flow of loss of fast flow portion, and air blast efficient improves.

Figure 12 representes the air horsepower of crossflow fan 2 and the relation of fluid energy, the high more situation of the expression big more air blast efficient of inclination.In the drawings, the longitudinal axis is represented fluid energy (W), and transverse axis is represented air horsepower (W).At this, the blower medium dip degree that is illustrated in mode of execution 2 of the present invention is compared big situation with blower in the past.Through experimental verification the flowing space among Figure 11 improve effect, the result can confirm following situation: can obtain big air blast efficient with respect to technology in the past.At this, obtaining can reducing rotating speed under the situation of identical blast volume, the result can confirm also to promote the improvement of noise.

In the above-described embodiment, be that the center is illustrated will cover 7 curve as the situation of logarithmic spiral, but the amplification degree of wind path is important in fact, curve is not limited to logarithmic spiral, also can have between the linearity sector.In the expansion beginning portion from wind path becomes the scope of 90 degree, analyze with respect to the enlarged-area of the diameter D of crossflow fan 2 preferable range than τ.

Through the structure of the blower shown in the mode of execution 2 of the present invention, can cover be enlarged curve setting in preferred range, can avoid causing damage with the cover collision from the air-flow that the crossflow fan wing is discharged; The not loss of momentum of the fluid that transmits by crossflow fan; The air blast performance is improved, and in addition, the result is; Can suppress intake, so noise, vibration reduce.In mode of execution 2 of the present invention, the air conditioner with blower has been described, but, has also been had equal effect for the blower that does not have heat exchanger, filter.

Description of reference numerals

1 housing, 1a front panel, 1b rear board, 1c top plate, 1d lower panel, 1e Left-Hand Panel, 1f right panel, 2 crossflow fans, 3 heat exchangers, 4 suction ports, 5 grids, 6 filters, 7 covers, 8 blow-off outlets, 9 stabilizers, 10 wings, 10a wing outer side surface, 10b wing inner side surface

Claims

1. blower has: housing, and this housing has intakeport and relief opening; Crossflow fan, this crossflow fan are configured in the above-mentioned housing; Cover, this cover is arranged on back side with respect to above-mentioned crossflow fan, constitutes the part of above-mentioned relief opening; Stabilizer; This stabilizer is arranged on the front surface side with respect to above-mentioned crossflow fan; Relative with above-mentioned cover, constitute the part of above-mentioned relief opening, it is characterized in that; Establish above-mentioned intakeport and running shaft above-mentioned crossflow fan roughly the maximum inhale width of rectangular direction be the diameter of A, above-mentioned crossflow fan when being D, have following relation: periphery blade fluid inlet angle β is defined as β=(A/D) * γ (radian), wherein A/D≤2 and 0.4>=γ>=0.3.

2. blower has: housing, and this housing has intakeport and relief opening; Crossflow fan, this crossflow fan are configured in the above-mentioned housing; Cover, this cover is arranged on back side with respect to above-mentioned crossflow fan, constitutes the part of above-mentioned relief opening; Stabilizer; This stabilizer is arranged on the front surface side with respect to above-mentioned crossflow fan; Relative with above-mentioned cover; Constitute the part of above-mentioned relief opening; It is characterized in that; Have following relation: enlarged-area is than by 1.416 >=τ >=1.466 regulation, and this enlarged-area is than being that r0, central angle are the ratio that the fan-shaped area of 90 degree obtains for enlarging the wind path area divided by radius, the curve that this expansions wind path area is become by the expansion wind path of above-mentioned cover, the length of beginning portion that begins to link the expansion wind path of above-mentioned cover from the rotating center of above-mentioned crossflow fan be r0 line segment and, the central angle of the rotating center of above-mentioned crossflow fan begins to form 90 areas that straight line surrounded of spending from above-mentioned line segment.

3. blower according to claim 2 is characterized in that having: housing, and this housing has intakeport and relief opening; Crossflow fan, this crossflow fan are configured in the above-mentioned housing; Cover, this cover is arranged on back side with respect to above-mentioned crossflow fan, constitutes the part of above-mentioned relief opening; Stabilizer; This stabilizer is arranged on the front surface side with respect to above-mentioned crossflow fan; Relative with above-mentioned cover, constitute the part of above-mentioned relief opening, it is characterized in that; When diameter that to establish the maximum inhale width that becomes the direction of approximate right angle with running shaft above-mentioned crossflow fan above-mentioned intakeport be A, above-mentioned crossflow fan is D, have following relation: periphery blade fluid inlet angle β is defined as β=(A/D) * γ (radian), wherein A/D≤2 and 0.4>=γ>=0.3.

4. an air conditioner is characterized in that,

This air conditioner has any described blower in aforesaid right requirement 1～aforesaid right requirement 3.